matlab中subs(g,'s',num=2;den=conv([1 0],[1 2]);den=conv(den,[1 3]);rlocus(num,den) hold onz=0.2;wn=3 ;re=-z*wn;im=sqrt(1-z^2)*wn;f=re+j*imfai=180-360*atan(im/(-re))/(2*3.14)syms sg=2/(s*(s^2+5*s+6))gs=subs(g,'s',f)这里边的subs(g,'s',有什么功
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![matlab中subs(g,'s',num=2;den=conv([1 0],[1 2]);den=conv(den,[1 3]);rlocus(num,den) hold onz=0.2;wn=3 ;re=-z*wn;im=sqrt(1-z^2)*wn;f=re+j*imfai=180-360*atan(im/(-re))/(2*3.14)syms sg=2/(s*(s^2+5*s+6))gs=subs(g,'s',f)这里边的subs(g,'s',有什么功](/uploads/image/z/5329248-24-8.jpg?t=matlab%E4%B8%ADsubs%28g%2C%27s%27%2Cnum%3D2%3Bden%3Dconv%28%5B1+0%5D%2C%5B1+2%5D%29%3Bden%3Dconv%28den%2C%5B1+3%5D%29%3Brlocus%28num%2Cden%29+hold+onz%3D0.2%3Bwn%3D3+%3Bre%3D-z%2Awn%3Bim%3Dsqrt%281-z%5E2%29%2Awn%3Bf%3Dre%2Bj%2Aimfai%3D180-360%2Aatan%28im%2F%28-re%29%29%2F%282%2A3.14%29syms+sg%3D2%2F%28s%2A%28s%5E2%2B5%2As%2B6%29%29gs%3Dsubs%28g%2C%27s%27%2Cf%29%E8%BF%99%E9%87%8C%E8%BE%B9%E7%9A%84subs%28g%2C%27s%27%2C%E6%9C%89%E4%BB%80%E4%B9%88%E5%8A%9F)
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